When developing a WordPress plugin or theme, there could be updates in future. When a plugin has updates, the developer can add new updates as new versions in plugins and themes. Normally, the WordPress plugin needs to be uploaded to WordPress.org plugins library and manage updates with git. But if it is a paid/pro plugin, it's not possible with WordPress.org, because WordPress.org is only for managing free plugins. In this situation, developers can manage the WordPress plugins and theme updates with their own servers with Plugin Update Checker. This is a custom update manager for WordPress plugins or themes useful if the owners don’t want to upload in public WordPress repositories. But it will help the users to get updates if available at the same time of developer update. The Custo...
